The idea of a Hyperdrive in most science fiction relies on the existence of a separate and adjacent dimension most commonly called “hyperspace,” though various other names have been used: “Drivespace,” “The Immaterium,” “slipspace,” “Space2,” “subspace,” “Zero-space,” etc. When activated, the hyperdrive shunts the starship into this other dimension, where it can cover vast distances in an amount of time greatly reduced from the time it would take in “real” space. Once it reaches the point in hyperspace that corresponds to its destination in real space, it re-emerges. Usually, hyperdrive refers to a method of travel in which it takes a measurable amount of time to go from one point to another. When the distance is covered instantaneously, the term jump drive is often used.